Segment for sizing-screens.



-A. H. YODER (1 E. HAGERTY.

SEGMENT FOR SIZING SCREENS.

APPLICATION FILED FEB. 24. 1917.

1,27 9,630. Patented Sept. 24,1918.

amvemtow attozmua UNITED STATES PATENT @FFICE.

ALBERT H. YOIDER, OF VFILBUR'ION, AND EDWARD HAGERTY, GF CENTRALIA, PENN- SYLVANIA, ASSIGNORS 0F ONE-HALF TO ELMER E. STRAUB, OF W ILBURTON, PENN- SYLVANIA.

SEGMENT FOR SIZING-SCREENS.

Application filed February 24, 1317. Serial 110 150,751.

To all whom it may concern: Be it known that we,'ALBnn'r H. Yonnn and Enwnno HAcnn'rY, citizens of the United States, residing respectively, at VVilburton and Centralia, in the county of Columbia, and State of Pennsylvania, have invented new and useful Segments for Sizing-Screens, of which the following is a specification.

The present invention appertains to shaking screens, such as used for sizing anthracite coal or other material, and aims to provide a novel and improved joint for the segments or sections of the screen.

The segments, according to the prevailing practice, are ordinarily overlapped at their meeting edges, and the overlapped edges are apertured for the reception of bolts, which clamp the overlapped edges together. This requires the use of. a comparatively large number of bolts, and even then, the joints between the segments are more or less weak andineflicient, the bolts or'seeuring elements breaking and wearing out due to the conditions to which they are subjected, and the portions of the segments between the bolts sagged or bending thereby permitting of the intermingling of the difl'erent sizes of material, which is objectionable. The ordinary lap joints are also objectionable, in that they require considerable time and labor in assembling and separating the segments.

It is the object of this invention to provide novel means for assembling the segments or sections of the screen, which will eliminate the objections resulting from the use of the ordinary lap joints, no bolts or securing elements being necessary to secure-the segments together, but the joints are nevertheless stronger in construction without requiring any appreciable increase in the amount of material'used. The present jointenables the segments to be readily assembled and separated for purpose of repair or replacement, thereby saving time and labor, and the intermingling of the various sizes of materials being screened is avoided due to the fact that the materials cannot work through the joints of the segments. The sagging of the joints is also overcome, due to the stiffening of the joints by reason of the present improvements, and there are no bolt heads or other parts to be knocked or worn off by the movement of the material over the joints.

It is also the object of the invention to Specification of Letters Patent.

provide the foregoing improvements which are extremely simple andinexpensive to incorporate in the sizing screens.

lViththe foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes'in' the precise embodiment of.

the invention herein disclosed, can be made within the scope of what is claimed, with-' out departmg from the spirit ofthe invene tion.

The invention is illustrated in the accompanying drawing, wherein Fi ure 1 is a perspective view of a fragmental'port-ion of a sizing screen, and illustrating the present improvements, portions being broken away. 7

Fig.2 is a section on the line 2-2 of Fig. 1. r i

Fig. 3 is a view similar to Fig. 2 illustrat ing a-.modiflcatio1 1.

In carrying out the invention, the segments or sections 1 which are in the form of apertured plates, are provided, as usual, at their side edges with upturned flanges 2 provided with apertures or slots 3 for bolting them to the sidesupports. In order to se-' I cure the companion segments together, one

edge of one segment is provided. with a flange or hp d bent upwardly at substantially ri ht angles between the respective ends oft-he flanges 2, the flange 4 being of less Patented se t. 24, 1918.

edge portion 5 of one segment projecting between the flanges 2 of the other segment. The flanges or lips 4 and G'being bent at an angle from the segment will stiffen the joints, whereby to V prevent the sagging thereof, and no belts or securing elements are necessary to clamp the overlapping portions together, nor is it possible for the material to work through the joint. The joint is used between each pair of segments or sections, one edge of each segment having the upturned flange a and the other edge having the down-turned flange 6. The flanges 4 are preferably at the upper ends of the segments, if they are slightly inclined, while the flanges 6 are at the lower edges.

Fig. 3 illustrates a variation in the joint. One segment has the upturned flange t which is bent into hook form to provide the lip-at overhanging thesegment. The edge portion 5 efthe other segment which extends between the flanges 2 of the first men- 1 tioned segment rests upon the lip 4t and is provided with a depending or downturned flange 6' abutting the edge of the lip 4E and bent back into hook form to interengage with the hook-shaped edge of the first mentioned section and-providing the lip 6 to underlie the hp 4'. This will provide even a more secure'joint for the segment.

In assembling the device shown in Fig. 3, the side flanges of the upper segment are placed between the side flanges of the lower segment, the sideflanges of the upper seg ment springing inwardly, and the side flanges of the lower segment springing out.- wardly. This spring -movement is very slight for several reasons, and works 110 permanent damage to the device- It is slight because, as shown in Fig. 3, the bottomv of the upper segment is elevated above the bottom of the lower segment, and consequently,- the amount that the side flanges ofthe'lower segment are sprung outwardly is much less than would be the case if the bottom of the upper segment rested directly, on the bottom of the lower segment. Most of the springing takes place in the side flanges of the lower segment, but the sideflanges of the upper segment may spring inwardly to some extent, the springingthus being divided to some degree at least between the flanges of the upper and lower segments- Since the flanges of the segments are supplied near to their ends with the slots 3, the resiliency of! the flanges is enhancedto some extent. If the segments are pulled injoppos'ite directions, the parts i and 6 will interlock, as shown in Fig.1 3, the side flanges of one segment springing back into alinement with the side flanges of the other segment. The operation above described may be carried out readily and the parts will. coaet with suflicient exactness to satisfy the requirements imposed on a coal screen, it being recalled that, in a device of the class descrlbed, a micromet-rie cooperation between coacting parts is not necessary.

is claimed as new is.:

1.- A screen embodying segments having upturned side flanges, one se ment provided at one edge between its side flanges with a portion extending upwardly at an angle to stiffen the segment and having an overhanging lip forming a hook, and the-other segment having its adjacent edge lip and provided with a portion extending downwardly at an angle to stiflen said edge portion and having a lip underlying the aforesaid lip to form a hook interengaged with theaforesa-id hook.

2. A screen embodying segments havin Having thus described the invention, what upturned side flanges, one segment provided at one edge between its side flanges with a portion extending upwardly. at an angle to stiffen andsupport said edge without the aid of other means, and the other segment, having its ad acent edge portion extending" over said portion between the side flanges of the first mentioned segment and provided with a portion extending downwardly at an angle to stiffen and support said edge p0rtion without the aid of other means and overlap the aforesaid portion to prevent the material assing between them, and to hold the segments against separation without the aid otother means, the ends of the side flanges of the two segments abutting to hold said portions in overlapped relation and prevent their separation.

In testimony that we claim the foregoing as our own, wehave hereto aiflxed'our sign atjures in the presence of two witnesses.

ALBERT H. YODER.

' EDWARD HAGERTY. iVitnesses EDWARD HERTER,

Jnrrnnson SHIPMAN.

Copies oi this patent may be obtained for five cents each. by addressing the Commissioner of latents,

. Washington, D. U. 

